At 06:23 PM 11/7/2006, karl dalen wrote: >Usually a diode has Vf of 0.3-0.6V a LED has 1.2-2,2V, >Are there any cheap single regular diodes that have like 2.5-3.3V Vf ? If by "regular" you mean Si, then no, the forward drop is determined by the Si bandgap.